1 /*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 /**
26 * @test
27 * @bug 8031320
28 * @summary Verify that on low abort ratio method will be recompiled.
29 * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary
30 * @build TestRTMDeoptOnLowAbortRatio
31 * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions
32 * -XX:+WhiteBoxAPI TestRTMDeoptOnLowAbortRatio
33 */
34
35 import java.util.List;
36 import com.oracle.java.testlibrary.*;
37 import com.oracle.java.testlibrary.cli.CommandLineOptionTest;
38 import com.oracle.java.testlibrary.cli.predicate.AndPredicate;
39 import rtm.*;
40 import rtm.predicate.SupportedCPU;
41 import rtm.predicate.SupportedVM;
42 import sun.misc.Unsafe;
43
44 /**
45 * Test verifies that low abort ratio method will be deoptimized with
46 * <i>rtm_state_change</i> reason and will continue to use RTM-based lock
47 * elision after that.
48 * This test make asserts on total locks count done by compiled method,
49 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used.
50 * For more details on that issue see {@link TestUseRTMAfterLockInflation}.
51 */
52 public class TestRTMDeoptOnLowAbortRatio extends CommandLineOptionTest {
53 private static final long LOCKING_THRESHOLD = 100L;
54
55 private TestRTMDeoptOnLowAbortRatio() {
56 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
57 }
58
59 @Override
60 protected void runTestCases() throws Throwable {
61 verifyRTMDeopt(false);
62 verifyRTMDeopt(true);
63 }
64
65 private void verifyRTMDeopt(boolean useStackLock) throws Throwable {
66 CompilableTest test = new Test();
67 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",
68 useStackLock ? "use" : "no");
69
70 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
71 logFileName,
72 test,
73 "-XX:+UseRTMDeopt",
74 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
75 useStackLock),
76 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
77 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD),
78 "-XX:RTMAbortThreshold=1",
79 "-XX:RTMAbortRatio=100",
80 "-XX:CompileThreshold=1",
81 "-XX:RTMRetryCount=0",
82 "-XX:RTMTotalCountIncrRate=1",
83 "-XX:+PrintPreciseRTMLockingStatistics",
84 Test.class.getName(),
85 Boolean.toString(!useStackLock)
86 );
87
88 outputAnalyzer.shouldHaveExitValue(0);
89
90 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);
91
92 Asserts.assertEQ(firedTraps, 1,
93 "Expected to get only one deoptimization due to rtm"
94 + " state change");
95
96 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
97 test.getMethodWithLockName(), outputAnalyzer.getOutput());
98
99 Asserts.assertEQ(statistics.size(), 2,
100 "VM output should contain two RTM locking "
101 + "statistics entries for method "
102 + test.getMethodWithLockName());
103
104 RTMLockingStatistics statisticsBeforeDeopt = null;
105
106 for (RTMLockingStatistics s : statistics) {
107 if (s.getTotalLocks()
108 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD + 1L) {
109 Asserts.assertNull(statisticsBeforeDeopt,
110 "Only one abort was expected during test run");
111 statisticsBeforeDeopt = s;
112 }
113 }
114
115 Asserts.assertNotNull(statisticsBeforeDeopt,
116 "After LockThreshold was reached, method should be recompiled "
117 + "with rtm lock eliding.");
118 }
119
120 public static class Test implements CompilableTest {
121 private static final Unsafe UNSAFE = Utils.getUnsafe();
122 private final Object monitor = new Object();
123
124 @Override
125 public String getMethodWithLockName() {
126 return this.getClass().getName() + "::forceAbort";
127 }
128
129 @Override
130 public String[] getMethodsToCompileNames() {
131 return new String[] {
132 getMethodWithLockName(),
133 sun.misc.Unsafe.class.getName() + "::addressSize"
134 };
135 }
136
137 public void forceAbort(boolean abort) {
138 synchronized(monitor) {
139 if (abort) {
140 Test.UNSAFE.addressSize();
141 }
142 }
143 }
144
145 /**
146 * Usage:
147 * Test <inflate monitor>
148 */
149 public static void main(String args[]) throws Throwable {
150 Asserts.assertGTE(args.length, 1, "One argument required.");
151 Test t = new Test();
152
153 if (Boolean.valueOf(args[0])) {
154 AbortProvoker.inflateMonitor(t.monitor);
155 }
156 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
157 t.forceAbort(
158 i == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD);
159 }
160 }
161 }
162
163 public static void main(String args[]) throws Throwable {
164 new TestRTMDeoptOnLowAbortRatio().test();
165 }
166 }